Ultra Black Hi-Temp RTV Silicone

Permatex Ultra Black Hi-Temp RTV Silicone

Permatex Ultra Black Hi-Temp RTV Silicone is a premium, fast-curing sealant engineered for high-temperature automotive and industrial applications. Formulated to match original-equipment silicone gasket performance, it provides durable, flexible sealing where heat, oil and movement are present.

• Fast-curing & sensor safe: Quick skin time with low odor and noncorrosive formulation safe for modern engine sensors.
• High temperature resistance: Withstands continuous service and intermittent peaks from -65°F to 550°F.
• Superior flexibility & oil resistance: Remains pliable to maintain a reliable seal under vibration, thermal cycling and exposure to oils and fluids.
• OE-level performance: Meets performance specifications of original-equipment silicone gaskets for long-lasting reliability.

Ideal for valve covers, oil pans, timing covers, intake manifolds and other high-heat sealing applications. Use to form reliable, leak-proof gaskets that endure harsh operating conditions.